1 /* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
18 /****************************************************************************************
19 Portions of this file are derived from the following 3GPP standard:
22 ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec
23 Available from http://www.3gpp.org
25 (C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
26 Permission to distribute, modify and use this file under the standard license
27 terms listed above has been obtained from the copyright holder.
28 ****************************************************************************************/
30 ------------------------------------------------------------------------------
36 ------------------------------------------------------------------------------
37 INPUT AND OUTPUT DEFINITIONS
39 int16 indice[] : indices of the selected codebook entries
40 int16 isf[] : quantized ISFs (in frequency domain)
42 ------------------------------------------------------------------------------
45 Coding/Decoding of ISF parameters for background noise.
47 The ISF vector is quantized using VQ with split-by-5
49 ------------------------------------------------------------------------------
53 ------------------------------------------------------------------------------
56 ------------------------------------------------------------------------------
59 ------------------------------------------------------------------------------
63 /*----------------------------------------------------------------------------
65 ----------------------------------------------------------------------------*/
67 #include "pv_amr_wb_type_defs.h"
68 #include "pvamrwbdecoder_basic_op.h"
69 #include "pvamrwbdecoder_acelp.h"
72 /*----------------------------------------------------------------------------
74 ; Define module specific macros here
75 ----------------------------------------------------------------------------*/
78 /*----------------------------------------------------------------------------
80 ; Include all pre-processor statements here. Include conditional
81 ; compile variables also.
82 ----------------------------------------------------------------------------*/
84 /*----------------------------------------------------------------------------
85 ; LOCAL FUNCTION DEFINITIONS
86 ; Function Prototype declaration
87 ----------------------------------------------------------------------------*/
89 /*----------------------------------------------------------------------------
90 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS
91 ; Variable declaration - defined here and used outside this module
92 ----------------------------------------------------------------------------*/
94 /*----------------------------------------------------------------------------
95 ; EXTERNAL FUNCTION REFERENCES
96 ; Declare functions defined elsewhere and referenced in this module
97 ----------------------------------------------------------------------------*/
99 /*----------------------------------------------------------------------------
100 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
101 ; Declare variables used in this module but defined elsewhere
102 ----------------------------------------------------------------------------*/
104 /*----------------------------------------------------------------------------
106 ----------------------------------------------------------------------------*/
109 int16 * indice, /* input: quantization indices */
110 int16 * isf_q /* input: ISF in the frequency domain (0..0.5)*/
115 isf_q[0] = dico1_isf_noise[(indice[0] << 1)];
116 isf_q[1] = dico1_isf_noise[(indice[0] << 1) + 1];
118 for (i = 0; i < 3; i++)
120 isf_q[i + 2] = dico2_isf_noise[(indice[1] << 1) + indice[1] + i];
121 isf_q[i + 5] = dico3_isf_noise[(indice[2] << 1) + indice[2] + i];
124 for (i = 0; i < 4; i++)
126 isf_q[i + 8] = dico4_isf_noise[(indice[3] << 2) + i];
127 isf_q[i + 12] = dico5_isf_noise[(indice[4] << 2) + i];
130 for (i = 0; i < ORDER; i++)
132 isf_q[i] = add_int16(isf_q[i], mean_isf_noise[i]);
135 Reorder_isf(isf_q, ISF_GAP, ORDER);